Merge pull request #33 from ChrisBoesch/master

update
Merge pull request #278 from ShaikDawood/master

Challenge Bug fixed#4
Merge pull request #279 from ShaikDawood/master

Update Badges Alignment#3
Merge pull request #280 from ruijunhuang2010/master

Merge pull request #33 from ChrisBoesch/master
Merge pull request #34 from ChrisBoesch/master

update
Merge pull request #281 from ruijunhuang2010/master

Merge pull request #34 from ChrisBoesch/master
edit challenge #1
Merge pull request #282 from ruijunhuang2010/master

edit challenge #1
edit challenge #2
Merge pull request #283 from ruijunhuang2010/master

edit challenge #2
resolve population of normal path drop down list
Merge pull request #284 from ruijunhuang2010/master

resolve population of normal path drop down list
minor change
Merge pull request #285 from ruijunhuang2010/master

minor change
Merge pull request #94 from ChrisBoesch/master

Updates